InChI=1S/C18H20O7S/c1-17-6-5-13-12-3-2-11(25-26(22,23)24)8-10(12)4-7-18(13,21)15(17)9-14(19)16(17)20/h2-3,8,13,15,21H,4-7,9H2,1H3,(H,22,23,24)/t13?,15?,17-,18?/m0/s1